// SPECIES PROFILE · SHRUB · NATIVE

Buttonbush

Cephalanthus occidentalis

Buttonbush blooms in midsummer with extraordinary creamy-white pincushion spheres an inch across — each one a bouquet of dozens of tubular flowers with protruding styles, swarming with swallowtails, sphinx moths, and native bees from dawn til dusk.

// QUICK FACTS

Family: Rubiaceae
Group: shrub
Native range: E. & C. North America incl. eastern OK wetlands
USDA hardiness: Zones 5–10
Mature size: 6–12 ft
Sun: Full sun to part shade
Water: Wet; tolerates standing water
Wildlife value: Fragrant blooms attract dozens of bee/butterfly spp.; nutlets feed waterfowl
Ecological role: wetland pollinator powerhouse · spherical white blooms

Buttonbush (Cephalanthus occidentalis) — *Cephalanthus occidentalis*. Photo via Wikipedia / Wikimedia Commons.

Field Notes

[ growing · ecology · siting · care ]

The premier native shrub for pond edges, rain gardens, and consistently soggy spots where most shrubs drown. Tolerates flooding indefinitely. Glossy leaves and unique seedheads extend interest into autumn.

Why it's on this list: wetland pollinator powerhouse · spherical white blooms. Part of Rooted Revival's NE Oklahoma plant catalog — natives, ecologically positive non-invasive cultivars, and food crops worth growing in the Tulsa region.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

Along a stream or seasonal floodplain, buttonbush pairs naturally with: american hornbeam (Carpinus caroliniana), cardinal flower (Lobelia cardinalis), eastern gamagrass (Tripsacum dactyloides), american elderberry (Sambucus canadensis), american sycamore (Platanus occidentalis), and joe-pye weed (Eutrochium purpureum).

Site buttonbush on the woodland edge or in the mid-layer of a guild beneath taller canopy trees.

Photo Reference

// Cephalanthus occidentalis — buttonbush
Photo: brinanana235 (iNaturalist, None)